CDC's ArboNet MapNational,state and county level disease cases (most reporting both human and non-human infections) for West Nile, St. Louis Encephalitic, Eastern Equine Encephalitis,Jamestown Canyon, LaCrosse, Powassan, Dengue (locally transmitted or imported [travel-related]), Chikungunya (loc or imp), Zika (loc or imp) viruses.
For summary and process and history, see PPT at http://www.nationalacademies.org/hmd/~/media/Files/Activity%20Files/Global/ZoonoticDisease/Presentation4Fischer.pdf